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x509_att.c

/* crypto/x509/x509_att.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include <openssl/stack.h>
#include "cryptlib.h"
#include <openssl/asn1.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>

int X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x)
{
      return sk_X509_ATTRIBUTE_num(x);
}

int X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid,
                    int lastpos)
{
      ASN1_OBJECT *obj;

      obj=OBJ_nid2obj(nid);
      if (obj == NULL) return(-2);
      return(X509at_get_attr_by_OBJ(x,obj,lastpos));
}

int X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk, ASN1_OBJECT *obj,
                    int lastpos)
{
      int n;
      X509_ATTRIBUTE *ex;

      if (sk == NULL) return(-1);
      lastpos++;
      if (lastpos < 0)
            lastpos=0;
      n=sk_X509_ATTRIBUTE_num(sk);
      for ( ; lastpos < n; lastpos++)
            {
            ex=sk_X509_ATTRIBUTE_value(sk,lastpos);
            if (OBJ_cmp(ex->object,obj) == 0)
                  return(lastpos);
            }
      return(-1);
}

X509_ATTRIBUTE *X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc)
{
      if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
            return NULL;
      else
            return sk_X509_ATTRIBUTE_value(x,loc);
}

X509_ATTRIBUTE *X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc)
{
      X509_ATTRIBUTE *ret;

      if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
            return(NULL);
      ret=sk_X509_ATTRIBUTE_delete(x,loc);
      return(ret);
}

STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x,
                               X509_ATTRIBUTE *attr)
{
      X509_ATTRIBUTE *new_attr=NULL;
      STACK_OF(X509_ATTRIBUTE) *sk=NULL;

      if (x == NULL)
            {
            X509err(X509_F_X509AT_ADD1_ATTR, ERR_R_PASSED_NULL_PARAMETER);
            goto err2;
            } 

      if (*x == NULL)
            {
            if ((sk=sk_X509_ATTRIBUTE_new_null()) == NULL)
                  goto err;
            }
      else
            sk= *x;

      if ((new_attr=X509_ATTRIBUTE_dup(attr)) == NULL)
            goto err2;
      if (!sk_X509_ATTRIBUTE_push(sk,new_attr))
            goto err;
      if (*x == NULL)
            *x=sk;
      return(sk);
err:
      X509err(X509_F_X509AT_ADD1_ATTR,ERR_R_MALLOC_FAILURE);
err2:
      if (new_attr != NULL) X509_ATTRIBUTE_free(new_attr);
      if (sk != NULL) sk_X509_ATTRIBUTE_free(sk);
      return(NULL);
}

STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE) **x,
                  const ASN1_OBJECT *obj, int type,
                  const unsigned char *bytes, int len)
{
      X509_ATTRIBUTE *attr;
      STACK_OF(X509_ATTRIBUTE) *ret;
      attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len);
      if(!attr) return 0;
      ret = X509at_add1_attr(x, attr);
      X509_ATTRIBUTE_free(attr);
      return ret;
}

STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE) **x,
                  int nid, int type,
                  const unsigned char *bytes, int len)
{
      X509_ATTRIBUTE *attr;
      STACK_OF(X509_ATTRIBUTE) *ret;
      attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len);
      if(!attr) return 0;
      ret = X509at_add1_attr(x, attr);
      X509_ATTRIBUTE_free(attr);
      return ret;
}

STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE) **x,
                  const char *attrname, int type,
                  const unsigned char *bytes, int len)
{
      X509_ATTRIBUTE *attr;
      STACK_OF(X509_ATTRIBUTE) *ret;
      attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len);
      if(!attr) return 0;
      ret = X509at_add1_attr(x, attr);
      X509_ATTRIBUTE_free(attr);
      return ret;
}

void *X509at_get0_data_by_OBJ(STACK_OF(X509_ATTRIBUTE) *x,
                        ASN1_OBJECT *obj, int lastpos, int type)
{
      int i;
      X509_ATTRIBUTE *at;
      i = X509at_get_attr_by_OBJ(x, obj, lastpos);
      if (i == -1)
            return NULL;
      if ((lastpos <= -2) && (X509at_get_attr_by_OBJ(x, obj, i) != -1))
            return NULL;
      at = X509at_get_attr(x, i);
      if (lastpos <= -3 && (X509_ATTRIBUTE_count(at) != 1))
            return NULL;
      return X509_ATTRIBUTE_get0_data(at, 0, type, NULL);
}

X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid,
           int atrtype, const void *data, int len)
{
      ASN1_OBJECT *obj;
      X509_ATTRIBUTE *ret;

      obj=OBJ_nid2obj(nid);
      if (obj == NULL)
            {
            X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_NID,X509_R_UNKNOWN_NID);
            return(NULL);
            }
      ret=X509_ATTRIBUTE_create_by_OBJ(attr,obj,atrtype,data,len);
      if (ret == NULL) ASN1_OBJECT_free(obj);
      return(ret);
}

X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr,
           const ASN1_OBJECT *obj, int atrtype, const void *data, int len)
{
      X509_ATTRIBUTE *ret;

      if ((attr == NULL) || (*attr == NULL))
            {
            if ((ret=X509_ATTRIBUTE_new()) == NULL)
                  {
                  X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_OBJ,ERR_R_MALLOC_FAILURE);
                  return(NULL);
                  }
            }
      else
            ret= *attr;

      if (!X509_ATTRIBUTE_set1_object(ret,obj))
            goto err;
      if (!X509_ATTRIBUTE_set1_data(ret,atrtype,data,len))
            goto err;

      if ((attr != NULL) && (*attr == NULL)) *attr=ret;
      return(ret);
err:
      if ((attr == NULL) || (ret != *attr))
            X509_ATTRIBUTE_free(ret);
      return(NULL);
}

X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr,
            const char *atrname, int type, const unsigned char *bytes, int len)
      {
      ASN1_OBJECT *obj;
      X509_ATTRIBUTE *nattr;

      obj=OBJ_txt2obj(atrname, 0);
      if (obj == NULL)
            {
            X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_TXT,
                                    X509_R_INVALID_FIELD_NAME);
            ERR_add_error_data(2, "name=", atrname);
            return(NULL);
            }
      nattr = X509_ATTRIBUTE_create_by_OBJ(attr,obj,type,bytes,len);
      ASN1_OBJECT_free(obj);
      return nattr;
      }

int X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj)
{
      if ((attr == NULL) || (obj == NULL))
            return(0);
      ASN1_OBJECT_free(attr->object);
      attr->object=OBJ_dup(obj);
      return(1);
}

int X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype, const void *data, int len)
{
      ASN1_TYPE *ttmp;
      ASN1_STRING *stmp = NULL;
      int atype = 0;
      if (!attr) return 0;
      if(attrtype & MBSTRING_FLAG) {
            stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype,
                                    OBJ_obj2nid(attr->object));
            if(!stmp) {
                  X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_ASN1_LIB);
                  return 0;
            }
            atype = stmp->type;
      } else if (len != -1){
            if(!(stmp = ASN1_STRING_type_new(attrtype))) goto err;
            if(!ASN1_STRING_set(stmp, data, len)) goto err;
            atype = attrtype;
      }
      if(!(attr->value.set = sk_ASN1_TYPE_new_null())) goto err;
      attr->single = 0;
      /* This is a bit naughty because the attribute should really have
       * at least one value but some types use and zero length SET and
       * require this.
       */
      if (attrtype == 0)
            return 1;
      if(!(ttmp = ASN1_TYPE_new())) goto err;
      if ((len == -1) && !(attrtype & MBSTRING_FLAG))
            {
            if (!ASN1_TYPE_set1(ttmp, attrtype, data))
                  goto err;
            }
      else
            ASN1_TYPE_set(ttmp, atype, stmp);
      if(!sk_ASN1_TYPE_push(attr->value.set, ttmp)) goto err;
      return 1;
      err:
      X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_MALLOC_FAILURE);
      return 0;
}

int X509_ATTRIBUTE_count(X509_ATTRIBUTE *attr)
{
      if(!attr->single) return sk_ASN1_TYPE_num(attr->value.set);
      if(attr->value.single) return 1;
      return 0;
}

ASN1_OBJECT *X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr)
{
      if (attr == NULL) return(NULL);
      return(attr->object);
}

void *X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx,
                              int atrtype, void *data)
{
      ASN1_TYPE *ttmp;
      ttmp = X509_ATTRIBUTE_get0_type(attr, idx);
      if(!ttmp) return NULL;
      if(atrtype != ASN1_TYPE_get(ttmp)){
            X509err(X509_F_X509_ATTRIBUTE_GET0_DATA, X509_R_WRONG_TYPE);
            return NULL;
      }
      return ttmp->value.ptr;
}

ASN1_TYPE *X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx)
{
      if (attr == NULL) return(NULL);
      if(idx >= X509_ATTRIBUTE_count(attr)) return NULL;
      if(!attr->single) return sk_ASN1_TYPE_value(attr->value.set, idx);
      else return attr->value.single;
}

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